/**
 * Copyright (C) 2011 Taobao Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.taobao.jaket.adapter;

import java.lang.reflect.Array;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;

import com.taobao.jaket.model.TypeDefinition;

/**
 * Represents a type adapter for {@link Enum} types
 * 
 * @author Xueqiang Mi
 */
public class EnumTypeAdapter implements CustomTypeAdapter {

    public boolean accept(Type type) {
        if (type instanceof Class<?>) {
            Class<?> clazz = (Class<?>) type;
            if (clazz.isEnum()) {
                return true;
            }
        }
        return false;
    }

    public TypeDefinition toJsonType(Type type) {
        if (!(type instanceof Class<?>)) {
            throw new IllegalArgumentException("unsupported type:" + type);
        }

        TypeDefinition td = new TypeDefinition("string");

        Class<?> clazz = (Class<?>) type;
        try {
            Method method = clazz.getDeclaredMethod("values", new Class<?>[0]);
            Object values = method.invoke(clazz, new Object[0]);
            int length = Array.getLength(values);
            for (int i = 0; i < length; i++) {
                Object value = Array.get(values, i);
                td.getEnums().add(value.toString());
            }
        } catch (SecurityException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

        return td;
    }
    
    public TypeDefinition toJavaType(Type type) {
        return new TypeDefinition(type.toString());
    }
}
